Question

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Answer 1

4.

${( - 2)}^{2} = 4$

${ - 2}^{2} = - 4$

${3}^{2} \times 3 = 27$

${ {(2}^{2} )}^{3} = {2}^{6} = 64$

5.

$12 \times {10}^{2} - {5}^{3} \times 10 = 10 {(12 \times 10 - 5}^{3} ) = 10(120 - 125) = 10 \times ( - 5) = - 50$

6.

$( { - 0.2bc}^{2} ) \times ( {20cx}^{2}) = - 4 {bc}^{3} {x}^{2}$